Can I switch between miles/gallons and kilometers/liters?

Yes, select your preferred unit system before logging a fill-up. The tracker converts all values accordingly.

Yes, all fill-up records are stored locally in your browser and will persist across visits. You can also export them as a CSV file.

Can I edit or delete old fill-ups?

Absolutely, each record has an edit and delete button for easy management.

Fuel Consumption & MPG Tracker: Log Fill-Ups & Calculate Mileage

Q: How does the fuel tracker calculate MPG?

MPG (miles per gallon) is calculated by dividing the miles driven since the last fill-up by the gallons of fuel added.

Dashboard

Total Fill-ups

Total Fuel

Gal

Total Cost

$0.00

Avg Economy

MPG

Cost per Mile

$0.00

Log New Fill-Up

Odometer Reading

Fuel Amount

Price Paid (Total $)

Date

Tank was filled completely (required for accurate MPG calculation)

Fill-Up History

Date	Odometer	Fuel	Price	Economy	Cost/Dist

How is fuel economy calculated?

Fuel economy (MPG or km/L) is calculated by dividing the distance driven since the last fill-up by the amount of fuel added. A full tank is recommended for accurate readings.

What can I learn from tracking?

By monitoring fuel economy over time, you can detect changes in your car's performance, plan fuel budgets, and compare different driving habits.

What should I do next?

Start logging every fill-up to build a complete history. Use the export feature to back up your data periodically.

The Ultimate Guide to Tracking Fuel Economy

Understanding your vehicle's fuel consumption is one of the simplest ways to save money and maintain your car. By tracking every fill-up, you can calculate real-world MPG, detect mechanical issues early, and optimize your driving style. Our free fuel tracker makes it effortless—just enter your odometer reading, the amount of fuel added, and the cost.

Fuel economy varies with driving conditions, tire pressure, and even weather. Consistent tracking reveals patterns: declining MPG may indicate a need for a tune-up, while steady improvement could reflect more efficient driving habits. The tool automatically computes cost per mile, total expenditure, and average economy over your selected time period.

How MPG Is Calculated

MPG = (Current Odometer - Previous Odometer) / Gallons Added. For metric users, km/L follows the same logic with kilometers and liters. The calculator only computes economy when the "full tank" box is checked, ensuring consistent fill levels for accurate comparisons.

Tips for Better Fuel Economy

Maintain steady speeds: Aggressive acceleration and braking can reduce fuel economy by up to 33% on highways.
Check tire pressure monthly: Under-inflated tires increase rolling resistance and fuel consumption.
Remove excess weight: An extra 100 pounds in your vehicle can reduce MPG by about 1%.
Use cruise control on highways: Maintaining a constant speed saves fuel.

Fuel Tracker FAQ

How does the fuel tracker calculate MPG?

MPG is calculated by dividing the miles driven since the last fill-up by the gallons added. Both values are taken from your entries.

Can I switch between miles and kilometers?

Yes, use the unit toggle at the top. All records will be displayed in your chosen unit, but existing data is stored independently of units.

Is my fill-up history backed up?

Data is saved in your browser's local storage. You can also export a CSV file at any time for safe keeping.

Can I edit a previous fill-up?

Currently, you can delete a record and re-add it. A full edit feature will be added in a future update.

Is my data private?

Absolutely. All information stays on your device. We never collect or transmit your fill-up data.

Do I need to fill the tank completely every time?

For the most accurate MPG calculation, yes. The tracker only calculates economy when you've marked the fill-up as a full tank.